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ADP5040
数据表
V
IN
RMS噪声( μV )
100
V
OUT
2
3
图87. LDO1 , LDO2响应线路瞬态,输入电压从
3.3 V至3.8 V ,V
OUT
= 1.8 V
09665-087
B
- 20.0 CH3结构
CH2
20.0mV/DIV
W
CH3
1.0V/DIV
1M
BW
20.0M
4.02V
200s/DIV
1.0MS/s
1.0s/pt
0.001
0.01
0.1
1
LOAD (毫安)
10
100
1k
图90. LDO1输出噪声与负载电流,在输入和
输出电压
RMS噪声( μV )
V
IN
100
V
OUT
2
3
图88. LDO1 , LDO2响应线路瞬态,输入电压从
3.3 V至3.8 V ,V
OUT
= 1.2 V
0.7
0.6
09665-088
B
- 20.0 CH3结构
CH2
20.0mV/DIV
W
CH3
1.0V/DIV
1M
BW
20.0M
4.84V
200s/DIV
1.0MS/s
1.0s/pt
0.001
0.01
0.1
1
LOAD (毫安)
10
100
1k
图91. LDO2输出噪声与负载电流,在输入和输出
电压
100
V
OUT
= 3.3V
V
OUT2
= 3.3V, V
IN2
= 3.6V ,我
负载
= 300毫安
V
OUT2
= 1.5V, V
IN2
= 1.8V ,我
负载
= 300毫安
V
OUT2
= 2.8V, V
IN2
= 3.1V ,我
负载
= 300毫安
10
输出电流(A )
0.5
0.4
噪声( μV / √Hz的)
1.0
0.3
0.2
0.1
0.1
4.1
4.6
V
IN
(V)
5.1
5.6
100
1k
10k
100k
频率(Hz)
1M
10M
图89. LDO1 , LDO2输出电流能力与输入电压
图92. LDO1噪声频谱在整个输出电压,
V
IN
= V
OUT
+ 0.3 V
第0版|第22页40
09665-106
09665-089
0
3.6
0.01
10
09665-105
10
0.0001
CH3 ; V
OUT
= 3.3V; V
IN
= 5V
CH3 ; V
OUT
= 3.3V; V
IN
= 3.6V
CH3 ; V
OUT
= 2.8V; V
IN
= 3.1V
CH3 ; V
OUT
= 1.5V; V
IN
= 5V
CH3 ; V
OUT
= 1.5V; V
IN
= 1.8V
09665-104
10
0.0001
CH2 ; V
OUT
= 3.3V; V
IN
= 5V
CH2 ; V
OUT
= 3.3V; V
IN
= 3.6V
CH2 ; V
OUT
= 2.8V; V
IN
= 3.1V
CH2 ; V
OUT
= 1.5V; V
IN
= 5V
CH2 ; V
OUT
= 1.5V; V
IN
= 1.8V

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